Color-lake and process of making same.



UNITED STATES PATENT OFFICE.

ALBERT srmrrLER, pr HooHsr-oN-rHE-MAIN, GERMANY, AssIeNoR T FARBWERKE VOBM. MEISTER LUCIU'S & BRIINING,

CORPORATION or GERMANY.'

VGOLQBELYAKE :AND PROCESS OF MAKING SAME.

Re Drawing,

To Mom-a may concern: 1 i Be itknown. that I', ALBERT STRUPLER,

Ph. 1)., chemist,'a citizen of the Republic of Switzerland," residing "at Hochst fon-th'e Main, Germany, have invented certain new and useful Improvements in" Color-Lakes and Processes-of Making Same, of which the following is. a' specification.

In U. s. Patent'No. 1,043,211, dated Ndvember 5-, .1912, is described-the manufacture of pigment dyes on color-lakes prepared from the tetraalkyldiamino-para-chlorotrigreen A Now I have found that by using 3-nitro -4 chloro-malachite-green and 3-nitro-4-chl0ro-- brilliant-green respectively instead of the above mentioned dyestuffs, muchmore yellowish-green pigmentdyes of great purity and great value are obtained. It has not been possible to obtain such pure yellowishgreen tints. which supply a long-felt need, by the dyestufis or mixtures therefrom hitherto used in the industry. The preparation of pigment dyes from the said dyestuffs is -n1ade by causing the dye solution, for example, one of the tetraethyl dyestufi's, to act upon .a suspension of green'-earth, -2'. e. a,

naturally occurring magnesiumiron-aluminiummalciumsilicate, while thoroughly stirring, whereby insoluble pigments are precipi'tated which are compounds of the dye- Specificationof Letters Patent.

'tion of the-dyestut'fsmay also be efi'ected by othenpreci'pitating agents, such, for instance, as tannin, soaps, solutions (if resin, potassium silicate, or the like.

- Having now described my invention, what I claim is:

' 1. The herein describedprocess'of preparing. yellowish-green color-lakes, which icon.-

The precipita- HCiCHST-ON-THE-MAIN, GERMANY, 'A P v Patented J an. 2'7, 1914.

Application'filed April 15,1913. Serial No. 761,328. I

sists in precipitating the tet'raalkyl-diamino- 3-nitr0'4-chlorotriphenylmethane dyestuffs,- substantially as described.

2. As new products, the herein describedcolor-lakes. being compounds of the tetra-' alkyl-diamino-3 nitro 4mhI rOtriphenYl-methane dyestuffs with prepipitants, and being green powders of a bright tint, fast to water.-

3. As a new product, the herein described color-lake, being a green-earth compound of the tetraethyl-diamino -3 -nitro-t-ehlorotriphenyl-methane dyestuffs, and beinga green powder of a bright tint, fast to water, lime and light.

In tQSt1111011 whereof, I afiix my signature in presence of two witnesses.

p ALBERT STRUPL'ER.

. Witnesses 1 JEAN GRUXD, CARL GRUND. 

